Best High-Yield UK Cash ISAs vs Money Market Funds (2026 Comparison Guide)
Two of the most compared options today are Cash ISAs and Money Market Funds (MMFs) . Both are low-risk compared to stocks, but they work very differently and suit different financial goals. This guide breaks everything down in simple terms so you can decide which option is right for you in 2026. What Is a Cash ISA? A Cash ISA (Individual Savings Account) is a UK savings account that allows you to earn interest completely tax-free. This means any interest you earn is protected from UK income tax, making it one of the most efficient ways to save money. Key Features of Cash ISAs: Tax-free interest earnings Protected by FSCS (up to £85,000 per institution) Available as fixed-rate or flexible accounts Very low risk Ideal for emergency savings or long-term saving goals Cash ISAs are offered by banks and building societies and are regulated, making them one of the safest savings options in the UK. What Are Money Market Funds? Money Market Funds (MMFs) are investment funds that pool money f...